Moreau



(No Model'.) 3 Sheets-Sheet 2.

E. MOREAU. I

MAOHINE'HAND; ROCK DRILL.

Patented May 16, 1882.

3 Sheets-Sheet 3.

(No Model.)

ELMOREAU. MACHINE. HAND ROOKDRILL.

Patented May 16, 1882.

" UN TED STATES PATENT ()FFIGE.

EUGENE'MORE-AU, OF SAN FRANCISCO, CALIFORNIA, ASSIQNOR TO THEO- DORE W. STERLING, on SAME PLACE.

MACHINE-HAND ROCK-DRILL.

SPECIFICATION forming part of Letters Patent No. 258,100, dated May 16, 1882.

Application filed November 9, 1881.

To all whom it may concern Be it known that I, EUGENE MOREAU, of the city and county of San Francisco, State of California, have invented new'and useful Improvements in Machine Hand Rock-Drills; and I do hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to that class of machine hand rock-dri-llsin which a block or hammer is made to strike upon the head of the drill, or upon a device holding the drill, by means of suitable power while the'machine is pressed against the rock.

My invention consists in sundry details of construction, as will'hereinafter be fully described and claimed.

It furtherconsists in a means for rotating the drill at the time when it is withdrawn and when the force is not all expended in drawing the hammers back, and in certain other and further details of construction necessary to the full and perfect accomplishment of the operation, all of which will hereinafter fully appear, reference being had to the accompanying drawings, in Which-- Figure 1 represents a top view of my drill. Fig. 2 is a longitudinal section of same. Fig.

3 'showsan enlarged side view of feeding mechanism for supporting-rod. Fig. 4 shows a bottom view of same. same. Fig. 6 shows an enlarged top View of lifting and rotating mechanism. Figs. 7 and 8 show details of rotating mechanism. In the operation of machine hand rockdrills it is necessary to deliver a blow upon the drill and also to cause it to rotate. These two results are fully accomplished in various ways; but there is always a difficulty attendant upon the rotating of the drill,.which I will now explain. In drills of the class under consideration the recoil is generally resisted by the body, the

' weightof which is thrown against the end of the -frame, and remains a constant pressure. Therefore, when the blow is delivered and the sharp edge of the drill is driven into the rock, making a cut therein, it is not advisableto revolve the drill without withdrawing it from the out just made. If it be so rotated, much forcexis required to do. this because of the Fig. 5 shows a detail of I I mechanism and protect it from dust. Through this casing extends a loosely-journaled rod or spindle, H, the outer end of which is adapted to receive the drill'I through the intermediate (No model.)

pressure of the body and because of the necessity of breaking the edges of the cut in order to rotate. In doing this the edge of the drill must necessarily sufi'er, as the rock acts as a grindstone, so to speak, against which the drill is ground with considerable pressure.

A familiarinstance of the proper operation of a drill is seen in the work of a stone-cutter when drilling a hole with the aid of a common hand drill or tool and a hammer. When he delivers his blow he lifts the tool and turns it slightly. Whether this lifting be caused by the recoil or intentionally, it is the very effect desired. This is appreciable in a larger drill, where greater force is exerted; and my first improvement is intended to obviate this diffi culty by providing a means for automatically withdrawing or lifting the drill from the bottom of the hole after each blow.

Let A represent a frame; B, the end or plate intended to be pressed against the body; 0, the cross-braces; D D, the reciprocating hammers journaled in the cross-braces; E, their springs, by the tension of which power is given said hammers to deliverthe blow; F, the cams, and G the cam-shaft, to which power is applied by means of hand cranks.

The front of the frame is formed into a box or casing, H, having a removable cover, and intended to contain some of the operating chuck,-l, the construction of which I will hereas to have a forward movement when struck on its head J, against which the reciprocating {hammers D D are adapted to strike. outer sides of the hammers, near their ends, are ,firmly secured arms" or strips L, which extend To the forward into the casing H. These strips have inwardly-projecting lugs a extendinga sufficient distance inwardly to engage with the head J of the spindle H when the hammers are drawn back. These lugs, therefore, being in Ifront of the head J, will, when drawn back, f lift the spindle H, with its drill, awayfrom the bottom of the hole at each return-stroke, and give a proper opportunityto rotate the drill,

inafter explain. Itis sojournaled in the frame 5 tion is repeated. The drill isrthns'littedlat V hammer, I place the spiral spring 0 around,

each feed.

backthey cause-the cams Uto affectthelngs drill.

as I will show hereinafter. In order toretnrn the drill to its place-beibrethe blow ofthe head J of the spindle and picks it up and draws the drill away from the bottom of the hole. When the hammer is released fromnseam both hammer and spindle are thrown forward by their respective springs. The spindle, hav ing a much less. distance toltravel, causes the drill to press against the roekbet'orethe hammer strikes the head J, sothatthedrill-is in position when it receives theblow. lAtithe instant the blowisdelivered the .otherihamimer, picks up thespindle andthe same opera every stroke. As I have before explainetbthe best time to revolve the drill, is whenQthns' lifted. In order to accomplish this, Lhave-the cams U upon the inner sides; of .the forward ends of the arms L. These camszconsist of strips the surface or edge of which is azcurved incline plane, and they are placed so thatone has its cam-edge. downward, in order that. they may affect the spindle H- imthe same directi'on.

Upon the spindle. are-twoloosely-senslecves;

V, having lugs or pins r,;which.= areaadaipted to be engaged bylthe ,cams 'U. iq'Thehigs. or pins may have their. outer ends formed into friction-rollers. The sleeves Vhave alsopawls W, which engage with ratchets Xset. upon a feather upon .the spindle -.H, wherebythe, said spindle may have a free forward movement,

but be engaged by the ratchcts torotatethercjr with. Small springs s,-at.tached torthesleeves and to an appropriate brace, .piulllthe-qsleeves V, with their pawls, back to theirplacesnfter When the hammers are :1 drawn r; and turn the pawls W, which feedforward the ratchets X and revolve the spindleaand This mechanism isso"placedthatthe effect described is produced atthe .bestposstble time, vboth because the drill isthenwithdrawn and because thestrength of,-the.- openator is not all expended in drawingthoham? mers back, as the rotation happens..w-hen\.one

of the hammers has com pletcdits backward stroke and the other has juststartcd to return; At such a time the device. requireslittletpowj er, because one spring has been already-compressed and the other is just-starting. nln

order to gain the time atthispointnecessary to revolve the drill, Iconstrnct the pointsqof the cams F more upon a circle,- sothat after having-forcedone hammer baekto its limit the curveof :thepoint will holdit sufficiently long to allow the rotation of the drill to be accomplished by the other hammer when starting to return. Now, in order that the lifting and rotation of the drill may-be effective, it .is necessary that some hearing or support be rendered the machine, so that the drill may be lifted and guided or directed with accuracy uponitsretnrn.

" Under the frame, about the center, is a long rod, M, the forward end of which is designed I .topress against the face of the rock, as shown.

This rod is suitably supported and journaled,

that it may have a movement forward and back. It will be seen that when pressed against the face of the rock it supports the forward endlof. themachine and forms abearing for it, solthat-the pressure may be borne by it and the? drill relieved sufficiently to allow it tobe .liftedfrom. .thebottom. of the hole. the-frontof thexjnach-ine rigid and acts as a It holds guidefor the drill. -,Now, it is evident thatas the holeinthelrock deepens the drillitself is the,.only,part of .the machine which causedvance.

. 1, Thebframe is heldtsolidl y. by the guide-rod @M..qThis being-rthe.case,ilhe head J of the spindle H would very shortly come in contact witlr-thefront of theframcrandv no longer be able to vvadvance. :The way to avoid this is to have the "guide-rod M adaptedlto move backr-ward,-;so -that. the whole frameA, instead a of I he drill, mayradvance. vAs before stated, the rod M is snitablyjonrnaled to have this slidingplayybut I haveinvented ameans for {renderin g1 its movement automatic and cause I itto-loecur. only when req uired by; the forward progress-of the drill.

",iTheguide-rod M is provided upon its.rear

end with teeth, so thatit becomes a rack-bar. .Thisrtoothed .end passesthrongh aunt, N, which is jourualed-in a bearing, 0. The vnut N isalarger..thanthe rod, and only engages .said rodlwrhenlthe latter is forced down upon ;it. {This is .done." by a lever l, pivoted as shown,,and-.having acannp, npomone sider :IT-hiscam-is adapted by; the motion of .the lever to passlabovethelrod M and forceitdown uponzthennt N, and to releasethe rod, so that ,itwinay-lbe moved by thehand when necessary. ,-When3.the rodis locked in the nut itcantbe moved. by! the, rotation ofv the latter. Therear aside ot' the, nut is provided with abevel-gear, -,q,:,with\ which anotherbevel-gear, q", engages. {This latter-forms a part of a ratchet, Q, adapt- :;6(L,t0.=F.Q\'-O1VC. toward; the'rear.

a :R is a lever.;.having-,upon its rear end a pawl, S,-engaging with"the ratchet Q, and. having titsaothcr..endrforkcd. In .this fork alug, w,

;upon.the .end of.- an "arm, T, plays. The .arm

(T isyattached rto ,one sideofnthe hammer D. hen stheahammer is forced .hackrthe arm T lcanscsjtslng w to pushback the forked lever R byiwhichnmovement its pawl Sfeedsthe ratchet Q back, which turns the gears qt and forward over a new tooth. As the hammer the drill has advanced sufficiently to demand its retrogression for the further advancement of itself. It will be seen that this operation is dependent upon the forward progress of the drill, for as the drill advances the forward stroke of the hammer is lengthened, and through the mechanism described the rod M is drawn back.- This is the principle of this point of invention, and, using this advancement of the drill, I have shown intermediate mechanism to cause the guide-rod M to recede. I do not confine myself to this particular intermediate mechanism, for that is comparatively unimportant, the essence of the invention being in utilizing the progress of the drill to regulate the retrogression of the guide-rod M and consequent advancement of the drillframe. Any other intermediate mechanism dependent upon this principle will answer.

It will be necessary to frequently change the drill and to reset the guide-rod M. This may beaccomplished by hand readily by moving the lever P and disengaging the rod from the nut N. i

l is the chuck, secured to the spindle H by the set-screw 3 It has a hole in its forward end, in which the drill I is inserted. Through one side of the chuck is a bolt, Z,the head of which lies flush with the side, and the end reduced and having screw-threads upon it, upon which anut, A, is screwed. A hole is made through the bolt and the drill passes through the hole. Now, when the nut A is screwed up it draws the bolt Z in tightly and causes it to force the drill against one side of the chuck andbind it. By unscrewing the nut the bolt is loosened and releases the drill. It is obvi ous that the chuck could be secured to the spindle in like manner, if desired.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a machine hand rock-drill, the arrangement and combination of the hammers D'D,

provided with arms or strips L, having lugs a, and the loosely-journaled drill-holdin g spindle H, with its head J and spring 0, substantially as and for the purpose herein described.

2. In a machine hand rock-drill, the combination and arrangement of the hammers DD,

having arms or strips L and cams U, and the loosely-journaled drill-holding spindle H, with its sleeves V, having lugs 0*, springs s, and pawls W, and the feathered ratchets X, substantially as and for the purpose herein described.

3. In a machine hand rock-drill, the combination and arrangement of the hammers D D, having lugs a and cams U, and the looselyjournaled drill containing spindle H, with its head J, spring 0, loose sleeves V, with their lugs r, springs s, and pawls W, and the feathered ratchets X, substantially as and for the purpose herein described.

4. In a machine hand rock-drill, the combination and arrangement of the hammers D D, lifting-cams F F, having their points curved to the arc of a circle, as shown, arms L, with their cams U, and spindle H, with its sleeves V, lugs r, and pawls W, and the feathered ratchets X, substantially as and for the pur pose herein described.

5. In a machine hand rock-drill having a striking hammer, the combination of the loose ly-journaled drill-holding spindle H, threaded rod M, and a means for receding said rod M as the drill advances, consisting of the arm T, attached to the hammer, and having a pin or lug, w, the forked lever B, with its pawl S, the ratchet Q, gears q and q, and the actuating-nut N, substantially as and for the pur pose herein described.

6. In a machine hand rock-drill, the combination of the loosely-journaled drill-holding spindle H, supporting rod M, and intermediate mechanism to cause said rod to recede as the said spindle advances, substantially as and for the purpose herein described.

7. The combination herein ot' the threaded rod M, actuating-nut N, and locking device, consisting of the pivoted lever P, with its cam p, substantially as and for the purpose herein described.

In witness whereof I have hereunto set my hand. a

Witnesses: EUGENE MOREAU.

S. H. NoURsE, A. G. LAWRENCE.

IIO 

